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You are mixing up several different computers here.

> Maybe they meant the ZX Spectrum II

No. There was never never a "Spectrum II".

The second model after the original 16K and 48K was the ZX Spectrum Plus, in a keyboard derived from the 1984 Sinclair QL design.

Then the 3rd model was the ZX Spectrum 128, in the same keyboard, but with more ports and a large external heatsink.

> known to some as “The Toaster” for some reason.

Nope. The 128 was known as the "toastrack" for the heatsink.

> Rubber keyboard, I heard it referred to as dead-flesh.

Not since the Plus model, no.

After the 128, Amstrad bought the brand. It launched the ZX Spectrum +2 and +3.

Those are the closest to the nonexistent model number "II" but they do not have the QL-derived keyboard.